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1 /* |
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2 |
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_defun_h) |
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24 #define octave_defun_h 1 |
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25 |
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26 #if defined (octave_defun_dld_h) |
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27 #error defun.h and defun-dld.h both included in same file! |
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28 #endif |
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29 |
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30 #include "defun-int.h" |
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31 |
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32 // Define a builtin variable. |
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33 // |
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34 // name is the name of the variable, unquoted. |
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35 // |
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36 // defn is the initial value for the variable. |
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37 // |
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38 // ins_as_fcn is a flag that says whether to install the variable as |
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39 // if it were a function (allowing the name to also be used as a |
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40 // variable by users, but recover its original definition if cleared). |
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41 // |
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42 // protect is a flag that says whether it should be possible to give |
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43 // the variable a new value. |
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44 // |
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45 // eternal is a flag that says whether it should be possible to |
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46 // clear the variable. Most builtin variables are eternal, and |
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47 // cannot be cleared. |
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48 // |
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49 // sv_fcn is a pointer to a function that should be called whenever |
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50 // this variable is given a new value. It can be 0 if there is no |
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51 // function to call. See also the code in user-prefs.cc. |
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52 // |
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53 // doc is the simple help text for this variable. |
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54 |
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55 #define DEFVAR(name, defn, inst_as_fcn, sv_fcn, doc) \ |
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56 DEFVAR_INT (#name, SBV_ ## name, defn, inst_as_fcn, 0, sv_fcn, doc) |
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57 |
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58 // Define a builtin-constant, and a corresponding variable that can be |
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59 // redefined. This is just the same as DEFVAR, except that it defines |
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60 // `name' as a variable, and `__name__' as a constant that cannot be |
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61 // redefined. |
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62 |
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63 #define DEFCONST(name, defn, inst_as_fcn, sv_fcn, doc) \ |
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64 DEFVAR_INT (#name, SBV_ ## name, defn, inst_as_fcn, 0, sv_fcn, doc); \ |
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65 DEFVAR_INT ("__" ## #name ## "__", XSBV_ ## name, defn, 0, 1, sv_fcn, doc) |
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66 |
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67 // This one can be used when `name' cannot be used directly (if it is |
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68 // already defined as a macro). In that case, name is already a |
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69 // quoted string, and the name of the structure has to be passed too. |
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70 |
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71 #define DEFCONSTX(name, sname, defn, inst_as_fcn, sv_fcn, doc) \ |
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72 DEFVAR_INT (name, sname, defn, inst_as_fcn, 0, sv_fcn, doc); \ |
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73 DEFVAR_INT ("__" ## name ## "__", X ## sname, defn, 0, 1, sv_fcn, doc) |
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74 |
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75 // How builtin variables are actually installed. |
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76 |
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77 #define DEFVAR_INT(name, sname, defn, inst_as_fcn, protect, sv_fcn, doc) \ |
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78 do \ |
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79 { \ |
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80 builtin_variable sname (name, new octave_value (defn), \ |
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81 inst_as_fcn, protect, (sv_fcn ? 1 : 0), \ |
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82 sv_fcn, doc); \ |
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83 install_builtin_variable (sname); \ |
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84 } \ |
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85 while (0) |
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86 |
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87 // Define a builtin function. |
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88 // |
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89 // name is the name of the function, unqouted. |
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90 // |
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91 // args_name is the name of the octave_value_list variable used to pass |
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92 // the argument list to this function. |
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93 // |
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94 // nargout_name is the name of the int variable used to pass the |
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95 // number of output arguments this function is expected to produce. |
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96 // |
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97 // doc is the simple help text for the function. |
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98 |
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99 #define DEFUN(name, args_name, nargout_name, doc) \ |
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100 DEFUN_INTERNAL (name, args_name, nargout_name, 0, doc) |
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101 |
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102 // Define a builtin text-style function. |
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103 // |
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104 // This is like DEFUN, except that it defines a function that can be |
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105 // called from the Octave language without using parenthesis to |
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106 // surround the arguments). |
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107 |
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108 #define DEFUN_TEXT(name, args_name, nargout_name, doc) \ |
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109 DEFUN_INTERNAL (name, args_name, nargout_name, 1, doc) |
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110 |
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111 // Define a mapper function. |
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112 // |
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113 // name is the name of the function, unquoqted. |
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114 // |
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115 // ch_map is a pointer to a function that should be called for |
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116 // integer arguments that are expected to creat integer results. |
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117 // (It's a kluge to handle character mappers like isalpha.) |
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118 // |
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119 // d_d_map is a pointer to a function that should be called for real |
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120 // arguments that are expected to create real results. |
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121 // |
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122 // d_c_map is a pointer to a function that should be called for real |
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123 // arguments that are expected to create complex results. |
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124 // |
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125 // c_c_map is a pointer to a function that should be called for |
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126 // complex arguments that are expected to create complex results. |
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127 // |
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128 // lo is the lower bound of the range for which real arguments can |
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129 // become complex. (e.g., lo == -Inf for sqrt). |
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130 // |
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131 // hi is the upper bound of the range for which real arguments can |
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132 // become complex. (e.g., hi == 0 for sqrt). |
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133 // |
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134 // can_ret_cmplx_for_real is a flag that says whether this function |
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135 // can create a complex number given a real-valued argument |
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136 // (e.g., sqrt (-1)). |
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137 // |
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138 // doc is the simple help text for the function. |
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139 |
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140 #define DEFUN_MAPPER(name, ch_map, d_d_map, d_c_map, c_c_map, \ |
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141 lo, hi, can_ret_cmplx_for_real, doc) \ |
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142 do \ |
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143 { \ |
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144 builtin_mapper_function S ## name (ch_map, d_d_map, \ |
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145 d_c_map, c_c_map, lo, hi, \ |
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146 can_ret_cmplx_for_real, \ |
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147 #name, doc); \ |
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148 install_builtin_mapper (S ## name); \ |
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149 } \ |
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150 while (0) |
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151 |
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152 // Make alias another name for the existing function name. This macro |
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153 // must be used in the same file where name is defined, after the |
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154 // definition for name. |
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155 |
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156 #define DEFALIAS(name, alias) DEFALIAS_INTERNAL (name, alias) |
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157 |
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158 #endif |
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159 |
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160 /* |
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161 ;;; Local Variables: *** |
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162 ;;; mode: C++ *** |
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163 ;;; End: *** |
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164 */ |
